Transferring Videos (opens in new tab)

Hi, don't know if anyone can help me here but I am having trouble moving videos\. I have a stack on my S25 running Android 16 which I would like to move to a memory stick and then be able to put the memory stick using a USB C adapter into the S25 and watch them\. It seems I cannot do this for some reason\. I can copy the video onto a memory stick via my files but the moved file will not play in VLC, this seems to be the case for larger files\. Does anyone know how I can fix this? Running out ...